It may just be side effects from the Zoloft, but if you've taken it before without these side effects you would have to think probably not.
I have fibromyalgia, and I do get pain in my head like pressure, more on my face than my head, and I also get a very sore ear, as if I had an ear infection, but the doc checks it for me regularly and my ear is fine. Just another fibro symptom.
I don't want to suggest it might be fibro, but just something to keep in the back of your mind. If you are really concerned give your doc a call, better to be safe than sorry eh?
Hopefully it's just side effects that will settle quickly.
They say life is a bowl of cherries........... we just have to learn how to spit out the pips!